显示隐藏文件及文件夹:
defaults write com.apple.finder AppleShowAllFiles -boolean true ; killall Finder
不显示隐藏文件及文件夹:
defaults write com.apple.finder AppleShowAllFiles -boolean false ; killall Finder
defaults write com.apple.finder AppleShowAllFiles -boolean true ; killall Finder
defaults write com.apple.finder AppleShowAllFiles -boolean false ; killall Finder
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